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V L . - Abstract Form Papernumber 90-92.6 Authot'sname Simon Turner Type your abstract single-spaced in the blue box below. Do not use small type since your abstract will be reduced by 40%. Do not exceed the limits of the box. At the top of the box, type the title of the paper in upper- and lower- case letters. Follow the title with a comma and then the name of the authors Underline the name of the speaker. Put a comma after the author and speaker, and then type their affiliation and then their complete mailing address. Example Biological Remediation of Underground Storage Facilities, John D. Bogart and iames R. League. Mo Tec, Inc., P.O. Box 338, Mt Juliet, TN 37122-0338 Underground storage facilities take many forms. Any breach in the integrity of an underground system leads to serious problems. Mo Tec, Inc. has developed biological treatment techniques to remediate sites so contaminated. Virtually any organic material is biodegradable if treated appropriately. Mo Tec uses enhanced landfarm tech- niques, liquid solid contact digestion and a combination of techniques called the slurry hold drying bed process. This technology was commercially applied to a wood treating plant in Tennessee. The major target material to be treated was creosote sludge designated K-oDl by the EPA. The process achieved 98-99% removal efficiency. Besides eliminating toxic materials, the physical bulk was diminished as 4500 cubic yards were treated in a pilot study. Only 9-15 cubic yards of residual material was measured. 'OP5~5 Two Indoor Air Investigations -- Oceans Apart, Simon Turner, Healthy Buildings International, Inc. (HBI), 10378 Democracy Lane, Fairfax, Virginia, 22030, USA This paper presents two case histories of similarly sized yet contrasting buildings recently studied on the east and westEoat of the United States. Both buildings had been the subject of identical complaints by occupants yet they have been selected here to demonstrate their completely different engineering characteristics and basic causes of these complaints. One reflects its east coast heritage in its age (more than 50 years old), its occupants (government employees) and its ventilation system which was powerful, dirty and poorly ~fitte¢: Equally, the west coast building symbolized its location; new, mirrored sealed windows and clean systems but with high levels of recycled air, an obstructive VAV system and some design flaws. This paper questions the use of occupant questionnaires in such cases and uses these contrasting buildings to highlight the need instead for careful evaluation of the air supply systems themselves, as well as routine on-going "proactive" monitoring. The different filtration systems in use also demonstrate the need for a new standard test method for HVAC filters which reflects their ability to specifically remove respirable sized particles. Both these buildings were studied in July, 1989. nl~Pw*^xwu ~ T10991-0498